JPH0489610A - Magnetic tape device for making standard magnetic tapes - Google Patents

Abstract

PURPOSE:To exactly perpendicularly record respective standard data, which are recorded on a standard magnetic tape, in the travelling direction of the standard magnetic tape by providing a delay / advance adjusting circuit and adjusting timing for recording data signals to be recorded corresponding to the amount of shifting respective magnetic head elements. CONSTITUTION:Delay / advance adjusting circuits 31-39 are provided to adjust timing for recording data signals to be recorded onto the standard magnetic tape respectively connected to respective magnetic head elements 11-19. In this case, even when plural magnetic gaps G1-G9 of a magnetic head H are not exactly arranged perpendicularly to a travelling direction R of a standard magnetic tape 2 but displaced one and another, the delay / advance adjusting circuits 31-39 adjust timing for recording data signals S1-S9 to be recorded onto the standard magnetic tape. Thus, corresponding to the displacement, the data signals S1-S9 to be impressed to the respective magnetic head elements 11-19 are delayed / advanced and standard data D1-D9 to be recorded onto the standard magnetic tape 2 can be exactly arranged and recorded perpendicularly to the travelling direction R of the standard magnetic tape 2.

Description

[Detailed Description of the Invention] [Summary] The present invention is directed to quality inspection and performance adjustment of write and read magnetic heads of conventional open-reel type magnetic tape devices used as external storage devices for computer systems. With regard to magnetic tape devices for creating standard magnetic tapes used in applications such as The purpose is to record in a direction perpendicular to the running direction of a standard magnetic tape and with a slight deviation at an arbitrary time. It consists of a magnetic head consisting of a plurality of magnetic head elements arranged in a row, and a retardation adjustment circuit that adjusts the recording timing of data signals recorded on a standard magnetic tape connected to each magnetic head element. The forward adjustment circuit adjusts the recording timing of data signals recorded according to the amount of deviation of each magnetic head element, so that each standard data recorded on the standard magnetic tape is accurate with respect to the running direction of the standard magnetic tape. Also, as recorded perpendicular to
Each of the retardation adjustment circuits adjusts the recording timing of the data signal to be recorded so that each standard data recorded on the standard magnetic tape can be recorded in a direction perpendicular to the running direction of the standard magnetic tape and in an arbitrary manner. This feature is characterized in that it is configured so that it is recorded in a state that is slightly shifted from the .

[Industrial application field]

This invention relates to quality inspection and performance adjustment of write and read magnetic heads of conventional open-reel type magnetic tape devices used as external storage devices for computer systems. Inspecting whether the multiple magnetic gaps of the magnetic head are accurately aligned in a line perpendicular to the running direction of the magnetic tape, adjusting the azimuth of the magnetic head, or checking the data reading ability of the magnetic head for reading. Inspection, that is, when inspecting whether each standard data is recorded in a line perpendicular to the running direction of the standard magnetic tape and with what degree of deviation, and whether each standard data can be read by a magnetic tape device. The present invention relates to a magnetic tape device for producing standard magnetic tapes, which is used in applications such as the following.

[Conventional technology]

Quality inspection and performance adjustment of write and read magnetic heads of conventional general open-reel magnetic tape devices used as external storage devices for computer systems, that is, multiple write and read magnetic heads. Inspecting whether the magnetic gaps are accurately aligned in the direction perpendicular to the running direction of the magnetic tape and adjusting the azimuth, or inspecting the data reading ability of the read magnetic head, that is, mark 1! Each standard data line is perpendicular to the running direction of the magnetic tape, and
Conventionally, write magnetic tape devices have been commonly used for creating standard magnetic tapes, which are used to check how much different data is recorded and can be read.

The write and read magnetic heads of conventional open-reel type magnetic tape devices used as external storage devices for computer systems are 9-track or 7-track magnetic heads consisting of 9 or 7 magnetic head elements. are using.

Therefore, the quality inspection of the 9-track or 7-track magnetic heads of conventional magnetic tape devices of this type, for example,
The write magnetic head H for creating a standard magnetic tape for skew inspection or azimuth adjustment is shown in FIG. As shown in FIG. 2, it was a one-track magnetic head in which one magnetic gap G was perpendicular to the running direction R of the standard magnetic tape 2.

[Problems to be Solved by the Invention] However, the quality inspection and performance adjustment of write and read magnetic heads provided in conventional general open-reel type magnetic tape devices used as external storage devices of computer systems, for example, The standard of the standard magnetic tape 2 for skew inspection and azimuth adjustment is as shown in FIG. 5(B). The deviation distance between the delayed virtual standard data D1 and the most advanced virtual standard data D recorded on 9 tracks is 1 μm.
The following are severe.

Therefore, one magnetic gap G of the magnetic head H
is perpendicular to the running direction of the standard magnetic tape 2, and the deviation distance between the magnetic gap section GI shifted to the far right in the figure and the magnetic gap section G shifted farthest to the left is 1 μm.
It is necessary to manufacture the magnetic head H as follows.

However, with the current manufacturing technology, the deviation distance is 1 μm.
It is difficult to manufacture a magnetic head that is
It only takes about a month and requires a huge amount of man-hours.

At present, magnetic tape devices using a 7-track magnetic head are hardly in operation, so a 1-track magnetic head H with a single magnetic gap G as described above is used to create a standard magnetic tape. It's no longer necessary.

Therefore, as shown in FIG. 6(A), the magnetic head H for producing standard magnetic tapes is also equipped with conventional open-reel type magnetic tape devices used as external storage devices for computer systems. Like the write and read magnetic heads, there are multiple magnetic gaps G, ~G.

However, it is also conceivable to use a multi-track magnetic head H consisting of a plurality of magnetic head elements 11 to 19 arranged perpendicularly to the running direction R of the standard magnetic tape 2 as shown in FIG. 5(B). . However, in this case as well, it is difficult to arrange the plurality of magnetic head elements 1+ to 19 exactly at right angles to the running direction R of the standard magnetic tape 2.
As shown exaggeratedly in Figure (A), the magnetic head H is manufactured so that the deviation distance from other magnetic gaps is 0.5 μm or less based on the 5-track magnetic gap G. It's difficult.

Data signals (S1 to S
, ) is recorded on the standard magnetic tape 2, the result is (B) in Figure 6.
As shown in , standard data D, corresponding to the deviation of the magnetic gap Gl-G9, is a
The standard data D, will be delayed by h.

The present invention has been made to solve these conventional problems, and provides a magnetic tape for making a standard magnetic tape used for quality inspection of a multi-track magnetic head consisting of a plurality of magnetic head elements. so that each standard data recorded on the standard magnetic tape by the apparatus is recorded in a direction exactly perpendicular to the running direction of the standard magnetic tape, or in a direction perpendicular to the running direction of the standard magnetic tape; Another object of the present invention is to provide a magnetic tape device for producing a standard magnetic tape, which is configured to perform recording in an arbitrary slightly shifted state.

[Means to solve the problem]

In order to solve the above-mentioned problems, the present invention has a plurality of magnetic gaps G+ to G arranged in a direction perpendicular to the running direction of the standard magnetic tape 2, as shown in FIG. Magnetic head H consisting of head elements 11-1°
and retardation adjustment circuits 39 to 39 for adjusting the recording timing of data signals recorded on the standard magnetic tape connected to each of the magnetic head elements 1 to 19, respectively. , data signals S, -S recorded according to the amount of deviation of each magnetic head element 11-1°.

The recording timing of the standard magnetic tape 2 is adjusted so that each of the standard data D, to D, recorded on the standard magnetic tape 2 is recorded exactly at right angles to the running direction of the standard magnetic tape 2. Features: A magnetic tape device for creating standard magnetic tapes.

Further, each of the retarding adjustment circuits 31 to 39 adjusts the recording timing of the data signals 31 to S to be recorded, thereby adjusting each standard data D recorded on the standard magnetic tape 2.
, -D, are recorded in a direction perpendicular to the running direction of the standard magnetic tape 2 and optionally slightly shifted. This is a device.

[Effect]

According to the magnetic tape device for producing a standard magnetic tape according to the present invention, the plurality of magnetic gaps G, -G9 of the magnetic head H consisting of the plurality of magnetic head elements 11 to 19 are arranged in the running direction R of the standard magnetic tape 2. Even if the magnetic head elements 1 are not arranged at right angles to each other and are offset from each other,
The recording timing of the data signals 81 to 81S to be recorded on the standard magnetic tapes respectively connected to
By adjusting by the retarding adjustment circuits 31 to 39,
The data signals S1 to S9 applied to each magnetic head element 11 to 19 are retarded according to the deviation, and the standard data D1 to D9 recorded on the standard magnetic tape 2 are moved in the running direction R of the standard magnetic tape 2. It is possible to accurately arrange and record in the direction perpendicular to the image.

Further, each standard data D I recorded on the standard magnetic tape 2 is adjusted by retarding the recording timing of the data signals 81 to S by each of the retarding adjustment circuits 31 to 39.
-Dq can be recorded in a direction perpendicular to the running direction of the standard magnetic tape 2 and optionally slightly shifted.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a magnetic tape apparatus for producing a standard magnetic tape according to the present invention will be explained in detail with reference to the drawings.

FIG. 1(A) shows an embodiment of a magnetic tape device for creating a standard magnetic tape according to the present invention, and FIG. 1(B) shows an example of a standard magnetic tape on which standard data is recorded by this magnetic tape device. H is a multi-track magnetic head for writing to record standard data on a standard magnetic tape, and a plurality of magnetic gaps CI''' G q are perpendicular to the running direction R of the standard magnetic tape 2. It is formed from a plurality of magnetic head elements 11 to 19 arranged in the direction.

3, - 39 are retardation adjustment circuits for the data signals S, -S9 connected to the respective magnetic head elements 11 - 19, respectively, and these retardation adjustment circuits 39 - 39 respectively control retardation adjustment volumes l, 4. ~4. and is incorporated into each write circuit described later. These retarding adjustment volumes 41 to 4. By adjusting the data signals 81 to S to be applied to each magnetic head element 1,
, so that the standard data D1 to D recorded on the standard magnetic tape 2 are accurately perpendicular to the running direction R of the standard magnetic tape 2, that is, the skew is adjusted. be able to.

FIGS. 2 and 3 are explanatory diagrams for inspecting and adjusting the skew of the magnetic head H for writing.

In FIG. 2, reference numeral 5 indicates the magnetic head H for writing.
a magnetic head for reading disposed adjacent to the 6. ~6.
are each magnetic head element 5I to 5. of this magnetic head 5. to switch 7I~7. 8. lead circuit connected via; ~8
．． are each of the lead circuits 6. ~6. This is a retardation adjustment circuit equipped with a retardation adjustment volume for the skew adjustment signal built into the. 9. ~9. is the lead circuit 6. ~69, the switching device 7. ~7. 10+ to 10. are the lead circuits 61 to 6. In this embodiment, these oscilloscopes and oscilloscopes are individually connected to each magnetic head element, but in other embodiments (not shown), one oscillator and one oscilloscope are respectively connected. You can also connect.

111-119 are the lead circuits 61-6. a skew detection circuit connected to 12. ~12. is a plotter that records the skew detection results.

In FIG. 3, H is the magnetic head for writing, 13
9 to 139 are each magnetic head element 11 of this magnetic head H.
- 19, each of these write circuits 139-139 has a delay adjustment volume 4-4. Slow adjustment circuits 31 to 3 equipped with
9 (see Part 1) is incorporated. 14. ~14
．． are light control circuits, 71-7. is a switch, 9. ~9° is the oscillator, 101~10. An example is an oscilloscope, which is connected as shown.

(1) First, according to FIG. 2, correction of the read circuit of a magnetic head device for producing a standard magnetic tape will be explained.

■ Switcher 7 is connected to the read circuits 61 to 69 of the magnetic tape device.
．． ~7. The oscillators 9I-9° are connected through the lead circuits 61-6. Oscilloscopes 10I to 10.
With 5 tracks as a reference, the skews of the read circuits of other tracks are measured.

■ The skew of each lead circuit 6I to 69 measured in item 0 is calculated from each lead circuit 6. ~6. Retardation adjustment circuits 8 to 8, each having a retardation adjustment volume for signals of Accordingly, the delay and lead are adjusted so that they match the five-track read waveform, and each read circuit is corrected.

(2) Next, according to FIG. 3, correction of the write circuit of a magnetic tape device for producing a standard magnetic tape will be explained.

(2) A 9-track write magnetic head H is attached to a magnetic tape device for creating standard magnetic tapes, and write control circuits 14. ~149 and oscillators 91~9. and the switch 71-7. Switchable connection by .

■ Oscilloscope 101 to light circuits 139-139
~10. 5 while observing the output waveforms of the write circuits 131 to 139 with the oscilloscopes 10+ to 10.
The data signal retardation adjusting circuits 39 to 39 connected to the magnetic head elements 11 to 19 of the magnetic head H, respectively, adjust the rising edge of the waveform of the other track to the rising edge of the waveform of the 5th track using the track as a reference. Adjustment volume 4. ~4. Match by adjusting.

(3) After making the adjustments as described in (1) and (2) above, the standard data recorded on the standard magnetic tape 2 is transferred to the standard magnetic tape 2 using the read magnetic head 5 using the front/back reproduction method. Playback (read) from the front and back screens of the disc, and measure the skew based on 5 tracks.

(4) The lead circuit 6. The oscillators 91 to 9 are connected to the oscillators 91 to 69, and the measurement is performed in section (3) using 5 tracks as a reference, and each magnetic head element 51 to 5.
The skew of LEET circuits 6I to 6. The signal is adjusted by retardation adjustment circuits 81 to 89 having a retardation adjustment volume,
5 Match the rise of the trunk waveform.

According to the above items (1) to (4), the physical skew of the read magnetic head 5 for the 5th track is electrically corrected to zero (the rises of the waveforms of the 1st to 9th tracks match).

(5) Record the data signal from the write magnetic head H onto the standard magnetic tape 2, and read the read waveform of the recorded standard data D+=Dq from the oscilloscope 101 to
109, and the skew of the write magnetic head H is measured using 5 tracks as a reference.

(6) Oscillators 91 to 9 are connected to the light circuits 139 to 139.
, and the skew of the write magnetic head H measured in section (5) is determined by adjusting the retardation adjustment volumes 4I-4. As a result, the leading track (314, 7, 9) rack) is delayed by the leading skew amount, and the trailing track (12, 6, 8) rack) is delayed by the trailing skew amount. Adjust the delay.

(7) After making the adjustments up to (6), write the standard data D onto the standard magnetic tape 2 to be created using the write magnetic head H.
-D, it is possible to create a standard magnetic tape 2 on which standard data without skew is recorded.

FIG. 4 shows that the standard magnetic tape 2 prepared as described above is loaded into a conventional general open-reel type magnetic tape unit MTU used as an external storage device of a computer system, and the magnetic head H' FIG. 3 is an explanatory diagram of azimuth adjustment and skew measurement.

First, azimuth adjustment is performed as follows.

(2) Connect the oscilloscope 15 to the check terminal (not shown) of the read circuit of the magnetic tape unit MTU.

(2) Load the standard magnetic tape 2 into the magnetic tape unit MTU, run it, and observe the read waveform of the 91-rack with one track as a reference.

(2) As a result of the observation in item 0, if the phases (rises of waveforms) of the read waveforms of track (2) and track 9 are out of sync, adjust the inclination of the magnetic head with the azimuth adjustment screw 16 to match the phases of the waveforms.

■ As a result of the adjustment in item 0, a magnetic head that cannot be fully adjusted is considered defective.

Next, skew measurement is performed as follows.

(2) Connect the oscilloscope 15 to the check terminal (not shown) of the read circuit of the magnetic tape unit MTU.

■ Load standard tape 2 into the magnetic tape unit MTU and run it, and use track 5 as a reference to record other tracks (1 to 4).
track, 6 to 9 tracks).

(2) As a result of the measurement in item 0, a magnetic head that cannot be corrected by the read circuit and write circuit of the magnetic tape unit MTU is determined to be defective.

Incidentally, in the present invention, each delay adjustment circuit 3 for the data signal
Due to the retardation adjustment in steps 9 to 39, each standard data D1 to D recorded on the standard magnetic tape 2 is in a state perpendicular to the running direction of the standard magnetic tape 2 and arbitrarily slightly shifted. You can also record on this standard magnetic tape 2.
can be used to test how much a magnetic tape device can read each standard data recorded in a shifted state.

〔Effect of the invention〕

As explained above, the present invention provides a magnetic head including a plurality of magnetic head elements in which a plurality of magnetic gaps are arranged perpendicularly to the running direction of a standard magnetic tape, and a magnetic head connected to each magnetic head element. It consists of a retardation adjustment circuit that adjusts the recording timing of the data signal recorded on the standard magnetic tape, and each retardation adjustment circuit adjusts the recording timing of the data signal recorded according to the amount of deviation of each magnetic head element. A magnetic tape for producing a standard magnetic tape, characterized in that the magnetic tape is adjusted so that each standard data recorded on the standard magnetic tape is recorded in a direction exactly perpendicular to the running direction of the standard magnetic tape. Because it is a device, even if the multiple magnetic gaps of the magnetic head consisting of multiple magnetic head elements are not aligned exactly at right angles to the running direction of the standard magnetic tape, but are offset from each other,
By adjusting the data signal retarding adjustment circuit connected to each magnetic head element, the data signal applied to each magnetic head element is retarded according to the deviation, thereby adjusting the standard data recorded on the standard magnetic tape. , it is possible to create a standard magnetic tape in which recording is accurately arranged perpendicular to the running direction of the standard magnetic tape.
The manufacturing yield of this type of magnetic tape device can be improved.

Further, each of the retardation adjustment circuits adjusts the recording timing of the data signal to be recorded, so that each standard data recorded on the standard magnetic tape is perpendicular to the running direction of the standard magnetic tape, and By adjusting the retardation of each retardation adjustment circuit for the data signal so that the data signal is recorded with a slight deviation, each standard data recorded on the standard magnetic tape is adjusted so that each standard data recorded on the standard magnetic tape is recorded with a slight deviation from the running direction of the standard magnetic tape. It can be recorded at right angles and optionally slightly offset.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing an embodiment of the present invention, FIGS. 2 and 3 are explanatory diagrams for inspecting and adjusting the skew of a write magnetic head, and FIG. 4 is a general magnetic tape device using standard magnetic tape. FIGS. 5 and 6 are explanatory diagrams of azimuth adjustment and skew measurement of a magnetic head, and FIGS. 5 and 6 are explanatory diagrams of a conventional example. H...Magnetic head G, -G,...Magnetic gap 11-19...Magnetic head element 2...Standard magnetic tape 3□-39...Retardation adjustment circuit 4I-4. . . . Slow adjustment volume 5 . . . Read magnetic head 5, ~5. ...Magnetic head element 6°~6. ...Lead circuits 71-7. ...Switcher 8, ~8. ...Leg adjustment circuit 9□-99...Oscillator 101-109...Oscilloscope 111-119...Skew detection circuit 121-12.
...Plotter 13, ~139...Write circuit 14, ~14. ...Write control circuit 15...Oscilloscope 16...Azimuth adjustment screw 11...Magnetic head H'...Magnetic head MTU...Magnetic tape device

Claims (2)

[Claims] (1) A magnetic head (H) consisting of a plurality of magnetic head elements (1_1 to 1_9) in which a plurality of magnetic gaps (G_1 to G_9) are arranged in a direction perpendicular to the running direction of the standard magnetic tape (2); It consists of retardation adjustment circuits (3_1 to 3_9) that adjust the recording timing of data signals recorded on the standard magnetic tape connected to each magnetic head element (1_1 to 1_9), respectively, and each retardation adjustment circuit (3_1 ~3_9) adjusts the recording timing of the data signals (S_1 to S_9) recorded according to the amount of deviation of each magnetic head element (1_1 to 1_9), and adjusts the recording timing of each standard magnetic tape (2) to be recorded on the standard magnetic tape (2). Data (D
_1 to D_9) are configured to be recorded exactly in a direction perpendicular to the running direction of the standard magnetic tape (2). (2) a magnetic head (H) consisting of a plurality of magnetic head elements (1_1 to 1_9) in which a plurality of magnetic gaps (G_1 to G_9) are arranged in a direction perpendicular to the running direction of the standard magnetic tape (2); It consists of retardation adjustment circuits (3_1 to 3_9) that adjust the recording timing of data signals recorded on the standard magnetic tape connected to each magnetic head element (1_1 to 1_9), respectively, and each retardation adjustment circuit (3_1 -3_9), each standard data (D_1 to D_9) recorded on the standard magnetic tape (2) can be recorded on the standard magnetic tape (2) by adjusting the recording timing of the data signals (S_1 to S_9) to be recorded.
1. A magnetic tape device for producing a standard magnetic tape, characterized in that the magnetic tape device is configured to perform recording in a direction perpendicular to the running direction of the tape and optionally with a slight deviation.